TY - JOUR
T1 - Nano-structural evolution of Ti(O, N, C) precipitates in V-4Cr-4Ti alloys studied by 3-dimensional atom probe
AU - Hatakeyama, M.
AU - Muroga, T.
AU - Tamura, S.
AU - Yamagata, I.
N1 - Funding Information:
This work has been performed by using facilities of the International Research Center for Nuclear Materials Science, Institute for Materials Research (IMR), Tohoku University. A part of this study was financially supported by the JAEA Cooperative Research Scheme on the Nuclear Fuel Cycle.
PY - 2011/10/1
Y1 - 2011/10/1
N2 - To investigate the effect of atmospheric impurities on the behavior of Ti(O, N, C) precipitates in V-4Cr-4Ti alloy at elevated temperatures, chemical and structural analysis were carried out using the laser-assisted 3-dimensional atom probe. After aging at 973 K for 40 h Ti(O, N, C) precipitates were observed around the depth of 1 μm from the specimen surface. The coarse precipitates with a diameter of about 50 nm consisted of mostly Ti, Cr, O and N. The O/N ratio of 142 was much larger than the value of 2 obtained from chemical composition of NIFS-HEAT1 alloy. The fine precipitates, which shows high O/N ratio of 4 seemed to be formed at the initial stage of aging. Thus, it is thought that the ingressed O affects the chemical composition and precipitation behavior of Ti(O, N, C) precipitates within the surface region.
AB - To investigate the effect of atmospheric impurities on the behavior of Ti(O, N, C) precipitates in V-4Cr-4Ti alloy at elevated temperatures, chemical and structural analysis were carried out using the laser-assisted 3-dimensional atom probe. After aging at 973 K for 40 h Ti(O, N, C) precipitates were observed around the depth of 1 μm from the specimen surface. The coarse precipitates with a diameter of about 50 nm consisted of mostly Ti, Cr, O and N. The O/N ratio of 142 was much larger than the value of 2 obtained from chemical composition of NIFS-HEAT1 alloy. The fine precipitates, which shows high O/N ratio of 4 seemed to be formed at the initial stage of aging. Thus, it is thought that the ingressed O affects the chemical composition and precipitation behavior of Ti(O, N, C) precipitates within the surface region.
UR - http://www.scopus.com/inward/record.url?scp=80053610659&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2011.02.034
DO - 10.1016/j.jnucmat.2011.02.034
M3 - 学術論文
AN - SCOPUS:80053610659
SN - 0022-3115
VL - 417
SP - 303
EP - 305
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -